Rad,
All Windows 2000 DHCP servers are registered in Active Directory, so it should be simple enough to query AD for them. I was looking for a COM method but so far have only found the following Q article.

How to Use Netsh.exe to Authorize, Unauthorize and List DHCP Servers in Active Directory (303351)
http://premier.microsoft.com/premier/library/default.aspx?scid=kb;en-us;303351
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